Satellite receiver with interfering signal cancellation

Abstract

A method for communication includes receiving a Radio Frequency (RF) channel containing a desired signal conforming to a first air interface and an interfering signal conforming to a second air interface. A first receiver configured for the first air interface and a second receiver configured for the second air interface are synchronized to a common frequency and timing reference. While the first and second receivers are synchronized, the desired signal is decoded from the RF channel using the first receiver to generate a first output, the interfering signal is decoded from the RF channel using the second receiver to generate a second output, and the desired signal is reconstructed while suppressing the interfering signal by jointly processing the first and second outputs.

Description

FIELD OF THE INVENTION[0001]The present invention relates generally to communication systems, and particularly to methods and systems for interference cancellation in communication receivers.BACKGROUND OF THE INVENTION[0002]Wireless communication systems are sometimes allocated shared or overlapping frequency bands. Overlapping allocations of this sort may cause interference from one communication system to another. For example, a terrestrial cellular system may cause interference to satellite communication receivers that operate in overlapping channels.[0003]Various methods and systems for mitigating interference are known in the art. For example, U.S. Patent Application Publication 2002 / 0110206, whose disclosure is incorporated herein by reference, describes a combined interference cancellation communication system for satellite communications. A receiver receives a waveform having data information and noise information. A filter bank is coupled with the receiver to receive and fi...

AI Technical Summary

Benefits of technology

[0012]In still another embodiment, the desired signal is received from a satellite, and the interfering signal is received from a terrestrial communication system. In a disclosed embodiment, receiving the RF channel includes receiving two or more interfering signals in addition to the desired signal, decoding the interfering signal includes decoding the two or more interfering signals using two or more respective second receivers that are synchronized to the common frequency and timing reference, to produce two or more second outputs, and jointly processing the first and second outputs includes reconstructing the desired signal while suppressing the two or more interfering signals. In an embodiment, jointly processing the first and second outputs includes selecting an order among the second outputs based on an ordering criterion, and combining the second outputs with the desired signal in accordance with the selected order.

[0013]There is additionally provided, in accordance with an embo

Problems solved by technology

Overlapping allocations of this sort may cause interference from one communication system to another.

For example, a terrestrial cellular system may cause interference to satellite communication receivers that operate in overlapping channels.

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